I think as long as Ottomans rule Balkans, Ottomans rule more Christians.
Russian rule Kazan, Caucasus Muslims, Bashkirs, Tatarstan and Turkestan. Ottomans rule Serbs, Vlachs, Bulgars, Greeks, Macedonians, Maronite, Assyrian, Armenian and Arab Christians. It will be interesting if anyone has data / guess on these people demography at that time.